Berean Study Bible
David was thirty years old when he became king, and he reigned forty years.

King James Bible
David was thirty years old when he began to reign, and he reigned forty years.

American Standard Version
David was thirty years old when he began to reign, and he reigned forty years.

Darby Bible Translation
David was thirty years old when he began to reign; he reigned forty years.

Douay-Rheims Bible
David was thirty years old when he began to reign, and he reigned forty years.

English Revised Version
David was thirty years old when he began to reign, and he reigned forty years.

Young's Literal Translation
A son of thirty years is David in his being king; forty years he hath reigned;